Hint: When you have to maim reality to this level to keep believing in your religion...

...the religion should be dropped.

Is he saying that the sun doesn't exist? Or that light can exist without stars?

He's probably trying to defend how the Genesis account talks about how God created the light from the Sun before the Sun.

In other words, he's disregarding established fact that not even most fundies question in order to defend a contradiction so obvious that even a five-year old should cry foul. This contradiction is found in a ludicrous myth not even intended to be taken seriously by the Jews who first fielded it.

Why? Because it's the only source of light in our solar system. If you stumble across another multi-million ton mass of hydrogen undergoing fusion, please let someone know. Hell, you might even get a Nobel Prize out of that.